﻿/*                       NOTICE
 * 
 * This software was produced for the U. S. Government
 * under Contract No. FA8721-10-C-0001, and is
 * subject to the Rights in Noncommercial Computer Software
 * and Noncommercial Computer Software Documentation Clause
 * (DFARS) 252.227-7014 (JUN 1995)
 * 
 * Approved for Public Release: 11-2435
 * © 2011 The MITRE Corporation. All Rights Reserved. 
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


using System;
using System.Collections.Generic;
using System.Text;

using Microsoft.Xna.Framework;

namespace MXSE.MultiTouch.Gestures
{
    public class SlideGesture : BasicGesture
    {
        //Stores the last significant change to the position.
        //Used to determine the direction the slide is moving in.
        public Vector3 lastChange;

        /// <summary>
        /// Constructor, uses an old TouchGesture to make a new SlideGesture.
        /// </summary>
        /// <param name="touchGesture">Old TouchGesture that will become a SlideGesture</param>
        public SlideGesture(TouchGesture touchGesture)
        {
            startPosition = touchGesture.startPosition;
            startTime = touchGesture.startTime;
            currentPosition = touchGesture.currentPosition;
            lastPosition = touchGesture.currentPosition;
            Id = touchGesture.Id;
        }

        public SlideGesture(DragGesture dragGesture)
        {
            startPosition = dragGesture.startPosition;
            startTime = dragGesture.startTime;
            currentPosition = dragGesture.currentPosition;
            lastPosition = dragGesture.currentPosition;
            Id = dragGesture.Id;
            speed = dragGesture.speed;
        }

        public override void Start()
        {
            contactManager.recognizer.publishMessage(
                "Slide " + Id + " started at " + currentPosition.X + ", " + currentPosition.Y,
                "SlideStart",
                Id,
                0, 0, 0, 0, currentPosition.X, currentPosition.Y
            );
        }

        public override void Update()
        {
            base.Update();
            if (Parent == null)
                if (contactManager.getDistance(lastPosition, currentPosition) > 0)
                    contactManager.recognizer.publishMessage(
                        "Slide " + Id + " moved to " + currentPosition.X + ", " + currentPosition.Y,
                        "SlideChange",
                        Id,
                        startPosition.X, startPosition.Y,
                        lastPosition.X, lastPosition.Y,
                        currentPosition.X, currentPosition.Y
                    );
        }

        public override void OnDeath()
        {
            contactManager.recognizer.publishMessage(
                "Slide " + Id + " ended.",
                "SlideEnd",
                Id,
                0, 0, 0, 0, 0, 0
            );
        }
    }
}
